. >>> los angeles international airport on high alert again, just weeks with after a gunman opened fire at the airport. travelers are forced to hit the ground. we'll have the story behind the scare. >>> it's 100 million years old, but to scientists it's brand-new. a 30-foot-long dinosaur that roamed north america long before t-rex. >>> how new 3d laser technology could save these structures for future generations. all that and much more on "cbs this morning saturday" november 23rd, 2013. >>> welcome to the weekend. we also have great guests for you this morning including the up and coming folk band houndmouth. >> and you know him from top chef. he delivers a pre-thanksgiving feast to "the dish". >> our top story, a powerful winter storm could cause a ton of travel problems this headline day. this of course one of the busiest travel times of the year. >> rain, snow, and high wind battered several western states since thursday. at least four deaths are blamed on the weather. that system is now moving east and could make it tough for millions of americans to get where they're going. here's